Thread protector



sept. 2, 1930. P. J. SHRUM I THREAD PROTECTOR Filed Jan. 20, 1928 Patented Sept. 2, 1930 ECE I PETER J. SI'IRUM, OF MONACA HEIGHTS, PENNSYLVANIA, .ASSGNOR T0 PITTSBURGH SCREW AND BOLT COREORATIOS, A. CORPORATION OF PENNSYLVINIA THREAD raorncr'on Application led January 20, 1928., Serial No. 248,128.

This invention relates to thread protectors and more particolari7 to` an improve ment in the construction thereof.

In my application for thread protectors executed by me under date of November 8, 1927, issued as Patent No. 1,762,248, J une 10, 1930, I disclosed a thread protector that is similar in some respects to the present protector, but unlike the present protector in many desirable features.

The protector disclosed in my above mentioned application is provided with a plurality of threaded openings in the body of the protectorhaving threaded studs disposed f therein and a copper strip fixed to the body et the protector and adapted to lie across the threaded openings to prevent the studs from coming in contact with the threadsto be protected. The present protector is provided with an improved means which is more desirable for certain applications and while this improved means embodies threaded openings and threaded studs, it is different from the above in that copper points are provided on the threaded studs for contacting with the threads to be protected instead of the copper strips and in addition, that portion ot the body surrounding the threaded opening is expanded outwardly or inwardly as the case may be so that the threaded studs may be removed from contact with the threads and still extend through the body of the protector. In this way the additional care that is required to withdraw the threaded studs only a certain distance in order that they may remain in the threaded openings, as disclosed in my above application, is eliminated. y

Another advantage ot the present protector for certain applications is the elimination of the expanded end. The present protector is cheaper to manufacture in view of the elimination of the expanded end and the substitution therefore of an outwardly or inwardly extending flange as the case may 3e for protecting the end of the pipe. The flange being outwardly extended when the protector is adapted for use with internal threads and inwardly extended when adapted for use with external threads.

An object of this invention is to provide a thread protector for the internal or externalthreads on the end of a pipe that is simple in structure and inexpensive to manufacture.

Other objects lie in the novel construction and combination of parts that will hereinafter be described and illustrated in the accompanying drawings, wherein,

Fig. 1 is a sectional view of a protector embodying the invention disposed on the end of a pipe having external threads, j

Fig. 2 is a view taken along the line lll-II of Fig. 1, i

`Fig. 3 is a sectional view similar to Fig. 1

showing a protector embodyingthe invention disposed on the end oia pipe having internal threads, and y Fig. 4l is a sectional view taken along the line IV-IV of Fig. 3.

In the drawings, Figs. 1 and 2 illustrate a protector tor protecting the threads on the end of a pipe or device 11 havingv external threads 12. The protector comprises a cylindrical body portieri 13 having its outer end terminating in an inwardly extending annular flange 14, rlhe flange 14; lies in a plane substantially at right angles to the longitudinal axis of the cylindrical portion 13 and is adapted to engage and protect the-outer end of the pipe 11.

`The cylindrical portion 13 of the protector is provided with a plurality 'of semi-spherical projections 15 each having ay threaded opening 16 therein. rThev threaded openings 16 are provided with threaded snids 17 having copper points 18, or points oi some material softer than the threads to be protected.

The advantage of the semi-sphericalprojections 15 containing the threaded openings 16, over my protector disclosed in the above mentioned application, is that the threaded studs 17 may be released from Contact with the pipe threads and stillibe entirely through the cylindrical wall by means ot the semi-spherical projections which provide a space 21 between the inner walls of the protector and the threads to be protected. In providing the threaded studs ith copper points, the necessity ot the copper strip is eliminated, making the present protector less expensive to manufacture.

Thisi accomplished Figs. 8 and 4 illustrate the present protector as applied to the end of a pipe l1 having internal threads 12. In this case the cylindrical portion 13 of the protector has an eX- ternal diameter substantially the saine as the internal diameter oi the threads to be protected and ot course the annular liange 14 extends in an outnfard direction instead of inward, as in the protectors illustrated by Fig. 1 and also the semi-spherical projections 15 extend inwardly instead ot outwardly as does the projections 15, illustra-ted in Fig. 1.

Vhile I have illustrated and described this invention in connection with a pipe having eX- 15 ternal or internal threads, it Will be obvious to those skilled in the art that the protector is equally adapted to protecting the plain ends of pipes or the like.

Vhat I claim as new and desire to secure Letters Patent on, is:

1. In a protector of the type adapted to slide over threads to be protected, a tubular body having a pipe end protecting right angled iange at one end thereof With portions of the body metal intermediate the ends of the protector pressed out of the plane of the body, and members threaded through said pressed out portions and provided With relatively sott contact ends for engaging the thing to be protected.

2. In a thread protector oi' the type adapted to slide over the threads to be protected, a generally tubular body having a pipe end protecting right angled flange at one end thereof, the body at points intermediate its ends being forced out of the body plane to forni clamp supports, and clamping screws threaded through said supports and having relatively so'lt metal contact ends for engag- 40 ing the threads to be protected.

3. In a thread protector, a generally tubular body slidable over the threads to be protected having a projecting pipe end protecting iange at one end thereof, a series of bulging portions at about the longitudinal center ot the body and soft ended screws threaded through said bulging portions for engagement with the threads to be protected.

In testimony whereof, I have hereunto subscribed my name this 31st day of December,

PETER J. SI-IRUM. 

